The ever wonderful Windows Vista Magazine has been running a recent set of articles on how to achieve a Windows Experience score of 5.9
The articles are great and well worth a read if you are looking to make sure your computers hardware and software is going to be capable of giving you the ultimate experience
Part 1: Focuses on memory and RAM
Part 2: Focuses on processing power
Part 3: Focuses on boosting your graphics
Part 4: Looks at increasing your hard disk speed
My nearly 2 year old Toshiba Tecra M7 comes in at a paltry 3.0, mainly due the graphics capability. If these where improved I could be up in the high 4s as the rest of the hardware is not to shabby.